明矾制硫酸钾和氧化铝的研究

A Study of the Separation of Aluminum Oxide and Potassium Sulfate from K-alum

对明矾进行了ＴＧ、ＤＴＡ分析，选择了明矾焙烧制Ｋ２ＳＯ４与Ａｌ２Ｏ３的试验影响因素．用Ｌ２７３１３正交表筛选出温度８７０℃、焙烧时间２５ｈ、粒径０９ｍｍ的较优焙烧参数．经３次重复试验得Ｋ２ＳＯ４产品的纯度为９９％，得率为９７４３％；Ａｌ２Ｏ３产品的纯度为９７２８％，得率为９９％

By analysing alum with TG and DTA for the selection of the technique for calcining alum,we determined the temperature(870℃), time(2 5h) and fineness(0 9mm)with the L 27 3 13 orthogonal array.The potassium sulfate(99% pure)and Al 2O 3(97 28% pure)were 97 43% and 99% respectively from the three times of repeated experiment.